Table 4.

Details of the reference test for studies included for systematic review

Author, year	Reference test	Autopsy standards	Person(s) performing reference test, experience	Blinded to antenatal clinical history	Blinded to index (ultrasound) test results	Median time between imaging or delivery and autopsy
Prodhomme et al, 201510	Conventional autopsy	Not stated	Pathologists, experience not quantified	No	Not stated	Not stated
Tuchtan et al, 201819	Conventional autopsy	Societé française de foetopathologie (SOFFoeT, France) guidelines	Pathologists, experience not quantified	No	Yes	Not stated
Votino et al, 201820	Conventional autopsy	Societé française de foetopathologie (SOFFoeT, France) guidelines	Pathologists with 20 years of experience	No	Yes	1 day from US to autopsy (1 hour–2 days)
Kang et al, 201917	Conventional autopsy or minimally invasive autopsy	Conventional autopsy guidelines (SOFFoeT and Royal College of Pathologists) Or Minimally invasive endoscopic methods described by Sebire N et al, 2012	Paediatric pathologists, >15 years of experience	No	Yes	5 days from delivery to autopsy (0–47 days)